Device and method for regulating the chamber pressure of coking chambers of a coke-oven battery using adjustable diaphragms at the ascending pipe elbow openings into the raw gas receivers

ABSTRACT

A device for regulating the chamber pressure of coking chambers of a coke-oven battery using adjustable iris diaphragms or iris nozzles at the ascending pipe elbow openings in the raw gas receiver. The gas stream flowing from the gas chamber of a coking chamber into the raw gas receiver can thus be regulated so that the pressure in the gas chamber of the coking chamber can be controlled. A method is also disclosed for regulating the gas stream which flows out the gas chamber of a coking chamber, wherein the pressure in the coking chamber is regulated by the control, and wherein also the liquid stream is regulated which serves to wash out the coking gases from the raw gas stream of the coking chamber.

The invention relates to a contrivance for regulating the chamberpressure of coke oven chambers in a coke oven battery by means ofadjustable iris diaphragms or iris nozzles at the standpipe gooseneckoutlet openings to the crude gas collecting main. The contrivance allowsthe flow rate of the gas stream flowing from the gas space of a cokeoven chamber into the crude gas collecting main to be regulated, thusallowing the pressure in the gas space of the coke oven chamber to beadjusted. The invention also pertains to a method for regulating the gasflow from the gas space of a coke oven chamber, whereby the pressure inthe coke oven chamber is regulated as a result thereof.

During the production of coke, coke oven gases are formed during thecoking process. These lead to a pressure increase in the gas space ofthe coke oven chamber. The pressure in the gas space is very muchdependent, among other things, on the progress of the coking process so,depending on the type of coke oven, considerable pressure may build upin the gas space. For this reason, if a chamber pressure control systemis used in conventional-type coke ovens, the coking gas is conveyed to anegative pressure-operated crude gas collecting main which extracts thecoking gas for subsequent use. There is usually a certain water level inthe crude gas collecting main as the crude gases from the coke ovenchamber are impacted with water for gas scrubbing purposes. Particles orentrained impurities can also be trapped and removed in this way.

The gas flows from the coke oven chamber into the crude gas collectingmain via a standpipe which, in a typical embodiment, branches into angooseneck and then passes into the crude gas collecting main via avertical connector. For scrubbing purposes, water is fed or injectedinto the gooseneck and the connector to the collecting main. In order toregulate the pressure, it is therefore necessary to ensure that thewater is continuously discharged or can at least be discharged atregular intervals.

EP 649455 B1 describes a method for regulating or controlling the gaspressure of a coke oven battery, in which a cup-shaped restrictorelement that can be filled with water is operated in accordance with thepressure variation during the formation of gas from the coal to becoked, each individual oven being restricted by adjusting the waterlevel in the restrictor element as a function of the actual pressureconditions in the respective coke oven chamber in such a manner that,depending on the desired gas pressure in the coke oven chamber, thewater level is adjusted as a function of the outflow or inflow of thewater from or into the cup-shaped restrictor element or as a function ofa predeterminable overflow level. The gas pressure is regulated via aswivel cup with one or more water outlets between the cup base and thecup rim, said cup being located below a rising pipe bend and designed sothat it can be filled with varying amounts of water via a coal waterline comprising a valve which is connected via operating devices and acomputer to pressure measuring points. The method has the disadvantagethat the oven pressure is regulated via a variable water level in animmersion cup and regulation of the water level thus depends on thevolumetric flow rate of the collecting main scrubbing liquid which issupplied to the immersion cup via the relevant water feed nozzles andwhich at times may therefore be low, meaning that the water level fallsbelow the minimum required for gas cooling and the crude gas is notcooled sufficiently.

EP 1390440 B1 describes a contrivance for regulating the gas pressure ina coke oven chamber comprising an immersion cup to which water issupplied and an immersion pipe which is connected to the gas space ofthe coke oven chamber and which terminates in the immersion cup, whereinthe immersion cup has an overflow and a closable outflow and wherein theimmersion pipe is designed with an end section, the free gas outletcross section of which depends on the liquid level in the immersion cup,whereby the liquid level can be regulated by a run-off pipe for water,the inlet end of which protrudes into the immersion pipe, said run-offpipe having jacket-sided inlet openings for the water feed and therebeing a slide that is open on both sides located in the run-off pipe,said slide closing off the inlet openings of the run-off pipe inlongitudinal direction according to its position and forming avertically adjustable overflow for the water flowing into the run-offpipe, and the inlet end of the run-off pipe being enclosed by a siphonpipe which closes off the run-off pipe at the top and forms an annularchannel that opens into the immersion cup below the immersion pipe sothat water can flow in. Again, this contrivance and the process itoperates have the disadvantage of being dependent on the water inflowalways allowing a certain water level to be built up in the immersioncup. Unlike in the above-mentioned EP 649455 B1, the water inflow rateis constant and is not regulated, making it possible, with a certainamount of effort, to control susceptibility to contamination by gascondensates as there is no need for a control valve in the inflowingwater stream.

Feeding water into the crude gas collecting main serves to maintain aflow of liquid through which the gas pressure in the coke oven chambercan be regulated. If the coke oven gas pressure is too low, air willpenetrate into the coke oven chamber and the combustion of coal or cokeoven gas may lead to overheating and consequently, to the coke ovenchamber being damaged. Too high a pressure causes unwanted emissions ofcoke oven gas into the environment. Moreover, the water added to thestandpipe or the standpipe gooseneck also serves as scrubbing water,removing particles and condensable constituents, such as tar, from thedischarged coke oven gas. It is thus desirable to achieve a continuouswater flow into the crude gas collecting main without influencing gaspressure regulation.

Therefore, the objective is to provide a gas-pressure-regulatingcontrivance which is not dependent on the water inflow and still allowswater to flow from the standpipe into the crude gas collecting main viathe regulating contrivance. The regulating contrivance should not beaffected by the coke oven gases and still allow the coke oven crudegases to mix thoroughly with the water or a liquid. On closure of theregulating contrivance, a residual water flow should still be maintainedto ensure that the scrubbing liquid discharges into the crude gascollecting main to prevent it from accumulating and flowing back intothe coke oven chamber. On the other hand, it must also be ensured thatthe gas-regulating contrivance closes reliably to prevent negativepressure being created in the coke oven chamber, which would suck airinto the gas collecting space and from there into the crude gascollecting main.

The invention achieves this objective by means of an adjustablediaphragm for regulating the gas and liquid flow into the gas collectingmain so that it is possible to adjust the flow rate of the mass flowpassing through the adjustable diaphragm. The diaphragm may be designedas a horizontally mounted, horizontally opening diaphragm that shuts offthe cross section of the standpipe gooseneck in horizontal directionlike a photographic diaphragm (also termed “iris diaphragm”). Thediaphragm may also be designed as a horizontally mounted, but verticallyopening, diaphragm, the petals of which, for example, fold down when thediaphragm opens (also termed “iris nozzle”).

Inside the standpipe gooseneck there may be a siphon, which, forexample, may be suspended at the side of the standpipe gooseneck or inthe middle of the standpipe gooseneck. In this way, the scrubbing liquidthat is injected into the gooseneck can be discharged at all times.However, it is also possible to omit the siphon, in which case theadjustable diaphragm is designed to leave a slight opening in the crosssection. This slight opening allows the liquid injected into thegooseneck to be drained into the crude gas collecting main even if thereis no siphon.

What is claimed in particular is a contrivance for regulating thechamber pressure of coke oven chambers in a coke oven battery by meansof adjustable diaphragms at the standpipe gooseneck outlet openings tothe crude gas collecting main, comprising

-   -   a coke oven battery consisting of a number of coke oven        chambers, wherein    -   each individual coke oven chamber can be hermetically sealed and        is equipped with a standpipe that is connected to a negative        pressure-operated crude gas collecting main via a gooseneck, and    -   the standpipe at the top end of the gooseneck is provided with        an opening and its closure that can be opened and closed, and    -   the gooseneck is equipped with a liquid feed inlet via which the        standpipe can be supplied at and/or downstream of the gooseneck        with a liquid running into the crude gas collecting main,        said contrivance being characterised in that    -   downstream of the gooseneck the standpipe opens into the crude        gas collecting main via an outlet section and between the        gooseneck and the outlet section there is a diaphragm with an        adjustable cross section which is used to close off the gas and        liquid flow and which is equipped with a device for adjusting        the cross section of the opening, with    -   either the standpipe gooseneck and the crude gas collecting main        being connected via a siphon through which the liquid can drain        even when the diaphragm is closed, or    -   the diaphragm having a cross-sectional slit that leaves part of        the diaphragm cross section open even on complete closure.

In a typical embodiment of the invention the opening with the closure atthe gooseneck is a cover plate that for closure is fitted to the openingat the top end above the gooseneck branch, said cover plate beingequipped with a grasp for operation and a hinge at the gooseneck. Duringnormal operation this serves to equalise the coke oven chamber pressurewith respect to the outside pressure towards the end of the coking timeprior to opening the coke oven chamber doors, and also to clean tardeposits from the standpipe. A cover plate fitted to the top end of thegooseneck is the most advantageous embodiment although in an exemplaryembodiment a slide that opens sideways is also conceivable.

In an exemplary embodiment the diaphragm consists of plates that can beclosed in a concentric, tangential and circular manner towards thecentre of the standpipe. This corresponds to an embodiment which iscomparable to a photographic diaphragm. For opening or closing, theseplates are then moved in horizontal direction towards the centre of thepipe. There can be any number of plates and these can be of any size.Also the diaphragms can be of any number in the standpipe. The importantthing is that the plate material is resistant to the prevailingtemperatures and gas or liquid components. One embodiment regardingdiaphragms that close in a tangential and circular manner towards thecentre of a pipe (“iris diaphragms”) is known from U.S. Pat. No.4,094,492 A. However, this specification does not describe oven pressureregulation at the goosenecks branching off coke oven chamber standpipesand the special requirements that result, such as high temperatures,water flow through the diaphragm and sealing of the coke oven chamber toprevent negative pressure entering.

The diaphragms in the gooseneck pipe are typically connected to anactuator, by means of which they can be moved from the outside. In oneembodiment of the method, the plates are fitted with pins, all of whichare mounted in a specially provided slotted opening or flexibleconnection to a ring positioned above so that the plates and with themthe diaphragm opens or closes when the ring moves. The ring, which is inthe pipe, is then tightened or released from the outside, causing thepins to move the plates, thus opening or closing the pipe. This allowsthe diameter of the diaphragm opening to be regulated.

A further embodiment envisages a diaphragm consisting of plates that canbe closed in a concentric, secantial and direct manner towards thecentre of the standpipe. These may, for example, be plates that aremoved from the outer edge of the diaphragm to the centre of thestandpipe gooseneck until said plates close to form a ring-shaped discwith a central aperture or a disc that is completely shut. For openingor closing, these are then moved in horizontal direction. Again, theremay be any number of plates and these can be any size and made of anymaterial.

Again, these diaphragms in the gooseneck pipe are typically connected toa regulating device which allows them to be moved from the outside. Inone embodiment, the plates are fitted with pins. The pins can be pulledout of the gooseneck or the middle of the gooseneck pipe by means oflevers extending through the gooseneck wall to the outside so that theplates and with them the diaphragms open or close when the lever ismoved. This allows the diameter of the diaphragm opening to beregulated.

A further embodiment envisages the diaphragms consisting of plates thatare opened by being swung up or down in vertical direction. In thiscase, the plates are designed as petals that are preferably pulled downin the direction of flow by an actuator. This is consistent with anembodiment that is comparable to a funnel diaphragm. The further thepetals are pulled down, the wider the diaphragm opens. Again, there maybe any number of diaphragms and these can be any size and made of anymaterial. An embodiment for diaphragms that are opened by being swung upor down in the pipe in vertical direction (“iris nozzles”) are knownfrom DE 10002529 A1. However, this specification again does not describepressure regulation at the goosenecks branching off coke oven chamberstandpipes and the special requirements that result, such as hightemperatures, water flow through the diaphragm and sealing of the cokeoven chamber to prevent negative pressure entering.

A further embodiment envisages the diaphragms being equipped with acircumferential ring that can be tightened or released by a regulatingdevice via a transmission lever, thus pulling the plates up or lettingthem down and opening or closing the diaphragm with the gooseneck. Thisalso allows the diameter of the diaphragm opening to be regulated. In asimple embodiment, this ring is designed as a wire which is threadedthrough retainer hooks in the diaphragms so as to encircle saiddiaphragms. The mechanical drive of the regulating device can be of anydesign and the way in which the actuating pulse is transmitted can beleft to the technician.

In an exemplary embodiment the diaphragm can be adjusted by means of anelectric regulating device. A further embodiment envisages the diaphragmbeing adjusted by means of a pneumatic regulating device. In a simpleembodiment a manual actuator or regulating device is also conceivable.

The diaphragms and the actuator may be located in a gooseneck pipesection that can be removed from the gooseneck. For this, the removablepipe section can, for example, be flanged to the gooseneck.

In a preferred embodiment the contrivance is equipped with a siphon.However, it is also possible to equip the outlet section with a siphonthat runs through the middle of the standpipe gooseneck and is enclosedby the diaphragm when closed. This allows the water flow to continueeven when the diaphragm is closed. The standpipe gooseneck can also beequipped with a siphon at the side that laterally passes the standpipegooseneck outside of the standpipe. This allows liquid to pass througheven when the diaphragm is completely closed.

The siphon may be designed in any way. It may, for example, be designedas a simple S-shaped pipe but also as a double-walled pipe with aninside opening. It may also be equipped with separate conveying devices.The siphon may be made of any material and be of any type.

In one embodiment of the method the gooseneck pipe with the diaphragmshas a diameter of 0.25 m to 0.85 m measured at the point where thediaphragms are located but excluding said diaphragms. However, it ispossible to implement the method with any size diameter. In oneembodiment of the invention the standpipe that is connected to thegooseneck has a cover plate above the branch, said cover plate beingable to be opened and closed. During normal operation this serves toequalise the coke oven chamber pressure with respect to the outsidepressure towards the end of the coking time prior to opening the cokeoven chamber doors and to clean tar deposits from the standpipe.

The invention also relates to a method for regulating the gas flow froma coke oven chamber into a crude gas collecting main. What is claimed,in particular, is a method for regulating the chamber pressure of cokeoven chambers in a coke oven battery by means of adjustable diaphragmsat the standpipe gooseneck outlet openings to the crude gas collectingmain, wherein

-   -   coal is coked in cycles in the coke oven chambers of a coke oven        battery, the cycles comprising charging, coking and pushing        operations, and    -   the gas pressure in the coke oven chamber is regulated during        the coking process via a standpipe with a regulating device at        the end of the standpipe that transports the coking gas from the        gas space of the coking chamber to a negative pressure-operated        crude gas collecting main via a gooseneck, and    -   the standpipe from the coke oven chamber is fed with a liquid        stream flowing out of the coke oven chamber,        said method being characterised in that    -   the gas pressure in the gas space of the coke oven chamber is        regulated by a diaphragm as a regulating device that changes the        cross section of the standpipe gooseneck outlet, the cross        section of the diaphragm being regulated by means of a        regulating device, and    -   when the diaphragm is completely closed, the liquid from the        standpipe gooseneck discharges into the crude gas collecting        main either via a siphon or a slit in the diaphragm.

Typically, the coke oven gas flows into the standpipe gooseneck at atemperature of 700° C. to 1100° C. and is cooled immediately after entryby injecting liquid. The remaining liquid is then discharged into thecrude gas collecting main. After cooling, the gas typically still has atemperature of between 75° C. and 120° C. as can be shown by measuringthe temperature.

The process can be designed so that the diaphragm is controlled as afunction of the internal pressure of the coke oven chamber, thusallowing the opening and closing of the diaphragm to be controlled inaccordance with a typical coking cycle. When charging the coke ovenchamber, the diaphragm is opened fully so that the charging gases can besucked into the crude gas collecting main by the negative pressure thatprevails in this main. During the coking cycle the pressure in the cokeoven chamber is regulated so as to ensure that there is an optimumdesired value in the gas space of the coke oven chamber at all times.When pushing the carbonised coke out of the coke oven chamber, thepassage of the gas from the coke oven chamber to the crude gascollecting main is interrupted by partial or complete closure of thediaphragms. In this way air is prevented from entering the crude gascollecting main (so-called “uncoupling of the coke oven chamber from thecrude gas collecting main”). During this operation, the liquid cancontinue to flow into the crude gas collecting main via the siphon ifthe diaphragm is not provided with a slight opening in it. This permitsan optimum pressure setting in the coke oven chamber at all times,regardless of the liquid flow into the standpipe. Preferably, openingand closing of the diaphragm may be controlled by a computer.

The method and the device may be set so that, if the drive fails, theactuator remains in the control position it was last in.Overpressurisation in the coke oven chamber can thus be counteracted asthe pressure in the coke oven chamber normally drops during the cokingprocess. In such case any unwanted drop in pressure in the coke ovenchamber can be neutralised by increasing the pressure in the collectingmain. By this way, it is possible to regulate the gas pressure in thegas space of the coke oven chamber by altering the negative pressure inthe crude gas collecting main, if the control mechanism drive fails.

In many embodiments the standpipe that is connected to the gooseneck hasa cover plate above the branch that during normal operation serves toequalise the coke oven chamber pressure with respect to the outsidepressure towards the end of the coking time prior to opening the cokeoven chamber doors, and to clean tar deposits from the standpipe. In oneembodiment of the invention the cover plate of the standpipe above thebranch is temporarily opened while simultaneously closing the diaphragmwhen the doors of the coke oven chamber are opened. By closing thediaphragm air is prevented from being sucked in through the gooseneck asa result of the negative pressure in the crude gas collecting main andthe crude gas collecting main is sealed off from the surroundings. Oneembodiment envisages the possibility of pneumatically opening or closingthe cover plate located in the standpipe above the branch.

The regulating device for the diaphragms or the cover plate may, forexample, be moved by means of an electric drive. However, it may also bemoved, for example, by a pneumatic drive. In a simple embodiment it isalso conceivable for the cover plate or the diaphragm to be movedmanually. One embodiment of the invention envisages the pneumatic drivebeing powered by a nitrogen-containing gas. Another embodiment envisagesthe pneumatic drive being powered by air or by an air-containing gas.

The liquid introduced into the gooseneck may be any kind. Preferably, itis water. This serves to transport the particles and scrub the coke ovengases. One embodiment envisages the water containing ammonia. Acomputer-controlled unit can be used to control the regulating device.This may, for example, be deployed in the gooseneck as a function ofpressure. For this purpose, an exemplary embodiment envisages a pressureline in the gooseneck that transmits the pressure in the gooseneck to apressure sensor.

The advantage of the invention is to provide a regulated gas flow fromthe coke oven chamber to the crude gas collecting main that does notdepend on the inflow of water or liquid and still allows liquid to flowfrom the standpipe into the crude gas collecting main via the regulatingcontrivance. The regulation thus still allows the coke oven crude gasesto mix thoroughly with the water or a liquid when the diaphragm isclosed. On closure of the regulating contrivance, a residual water flowis maintained to ensure that the scrubbing liquid drains into the crudegas collecting main. If a suitable construction manner of the diaphragmis selected, the regulating contrivance can be reliably closed at alltimes.

The invention is illustrated on the basis of eleven diagrams, thesediagrams merely depicting embodiments of the invention.

FIG. 1 shows an arrangement with a coke oven chamber, standpipe,gooseneck and crude gas collecting main.

FIG. 2 and FIG. 3 show a device with a diaphragm in accordance with theinvention, in these cases the diaphragm being of a vertically openingtype. FIG. 2 shows said diaphragm in open and FIG. 3 in closed position.

FIG. 4 and FIG. 5 show a device with a diaphragm in accordance with theinvention, in these cases the diaphragm being of a vertically openingtype and having a siphon in the pipe. FIG. 4 shows said diaphragm inopen and FIG. 5 in closed position.

FIG. 6 and FIG. 7 show a device with a diaphragm in accordance with theinvention, in these cases the diaphragm being of a horizontally openingtype. FIG. 6 shows said diaphragm in open and FIG. 7 in closed position.

FIG. 8 and FIG. 9 show a device with a diaphragm in accordance with theinvention, in this case the diaphragm being of a horizontally openingtype and having a siphon in the pipe. FIG. 8 shows said diaphragm inopen and FIG. 9 in closed position. The diaphragms in accordance withthe invention in FIGS. 2 to 9 are shown in a side view.

FIG. 10 and FIG. 11 show vertical views looking down at the diaphragmsin accordance with the invention, FIG. 10 in closed position and FIG. 11in open position.

FIG. 1 shows a coke oven chamber (1) used to produce coke (2). The gasspace (3) is connected with a gooseneck (5) via a standpipe (4), saidgooseneck opening into a negative pressure-operated crude gas collectingmain (6). Depending on the operating conditions this main is filled witha liquid (7). In accordance with the invention, an outlet section (8) isfitted with a diaphragm (9) which permits or prevents the passage ofgas. Shown is the regulating device (10) that opens or closes thediaphragm (9). Said device is controlled as a function of the pressurein the gooseneck (5). For this purpose, there is a pressure gauge (11)in the gooseneck (5), said gauge being connected to a computer (12) thatcontrols the position of the diaphragm (9). In the gooseneck (5) thereis also a feed device (13) for liquid (14), preferably water. This flowsalong the wall of the gooseneck (5 a). Shown here is the diaphragm (9)in open position, allowing the water stream (14 a) and the crude gasstream (15 a) to pass through. Also shown here is the crude gas stream(15) from the coke oven chamber (1). The cover plate (16) of thestandpipe (4), which can be moved by means of a grasp mechanism (16 a),and which is attached to the standpipe (4) via a hinge (16 b), can betemporarily opened for pressure equalisation or cleaning.

FIG. 2 shows an outlet section (8) with a diaphragm made of plates inaccordance with the invention (9 a), the diaphragm being of a verticallyopening type. The liquid stream (14) injected into the gooseneck flowsalong (14 a) the wall of the outlet section (8). Shown are the crude gasstream (15), the almost completely open vertical diaphragm (9 a), theeffluent liquid stream (14 b) and the crude gas stream which is allowedto pass (15 a). The diaphragm (9 a) is opened or closed by means of aregulating device (10) that transmits the drive pulse via a lever (10 a)and a wire (9 c) as an actuator.

FIG. 3 shows the vertically opening diaphragm (9 b) made of plates inaccordance with the invention in closed form. Shown here are a residualliquid flow (14 b) and a liquid level (17) forming in the diaphragm (9b). Also shown is the actuator that controls the vertical diaphragms (9c), said actuator consisting of a wire.

FIG. 4 shows an outlet section (8) with a diaphragm in accordance withthe invention (9 a), the diaphragm being of a vertically opening typeand there being a siphon (18) in the middle of said outlet section. Thisis attached by means of a suspension fixture (18 a) and has an openinginside (18 b). Shown are the crude gas stream (15), the almostcompletely open vertical diaphragm (9 a), the effluent liquid stream (14b) and the crude gas stream which is allowed to pass through (15 a). Thediaphragm (9 a) is opened and closed by means of a regulating device(10).

FIG. 5 shows an outlet section (8) with a vertically opening diaphragm(9 b) in accordance with the invention, in this case the diaphragm beingin closed form and there being a siphon (18) in the middle of saidoutlet section. This is attached by means of a suspension fixture (18a). The siphon has an opening inside (18 b), there being a liquid comingup level thereto (17). As a result, crude gas (15) is prevented frompassing. Shown are the crude gas stream (15), the almost completelyclosed vertical diaphragm (9 b) and the effluent liquid stream (14 b).The diaphragm (9 b) is opened and closed by means of a regulating device(10).

FIG. 6 shows an outlet section (8) with a diaphragm made of plates inaccordance with the invention (9 d), the diaphragm being of ahorizontally opening type. Shown are the crude gas stream (15), thealmost completely open horizontal diaphragm (9 d), the effluent liquidstream (14 b) and the crude gas stream which is allowed to pass through(15 a). The diaphragm (9 d) is opened and closed by means of aregulating device (10). The plates which can be moved in horizontaldirection (9 d) can, for example, be moved across the whole pipe via aring-shaped actuator (9 f) for controlling the horizontal diaphragms (9f).

FIG. 7 shows an outlet section (8) with a diaphragm made of plates inaccordance with the invention (9 e), the diaphragm being in horizontallyclosed form. Shown are the crude gas stream (15), the almost completelyclosed horizontal diaphragm (9 e) and the residual effluent liquidstream (14 b). The diaphragm (9 e) is opened and closed by means of anactuator (9 f).

FIG. 8 shows an outlet section (8) with a diaphragm in accordance withthe invention (9 d), the diaphragm being of a horizontally opening typeand there being a siphon (18) in the middle of said outlet section. Thisis attached by means of a suspension fixture (18 a). Shown are the crudegas stream (15), the almost completely open horizontal diaphragm (9 d),the effluent liquid stream (14 b) and the crude gas stream that isallowed to pass through (15 a). The diaphragm (9 d) is opened and closedby means of an actuator (9 f).

FIG. 9 shows an outlet section (8) with a diaphragm in accordance withthe invention (9 d), the diaphragm being in horizontally closed form andthere being a siphon (18) in the middle of said outlet section. This isattached by means of a suspension fixture (18 a). Shown are the crudegas stream (15), the almost completely open horizontal diaphragm (9 d)and the residual effluent liquid stream (14 b). The siphon has anopening inside (18 b), there being a liquid coming up level thereto(17). As a result, crude gas (15) is prevented from passing. Thediaphragm (9 e) is opened and closed by means of an actuator (9 f) withslotted openings for controlling horizontal diaphragms (9 e).

FIG. 10 shows a vertical view looking down at the open diaphragms (9 a)in accordance with the invention. Shown is the diameter of the outletsection (8) of the standpipe gooseneck, the plates (9 a) in closed formand the regulating device (10) with the transmission lever (10 a). Inthis case, this is transmitted via a wire as an actuator (9 c), saidwire encircling the plates (9 a) in suitable retainer fixtures.

FIG. 11 shows a vertical view looking down at the closed diaphragm (9 b)in the outlet section (8) of the standpipe in accordance with theinvention, in this case said diaphragms being in closed form.

LIST OF REFERENCE NUMBERS AND DESIGNATIONS

-   1 Coke oven chamber-   2 Coke, coal-   3 Gas space-   4 Standpipe-   5 Gooseneck-   5 a Gooseneck pipe, standpipe gooseneck outlet-   6 Crude gas collecting main-   7 Liquid-   8 Outlet section-   9 Diaphragm-   9 a Open vertical diaphragm-   9 b Closed vertical diaphragm-   9 c Wire for controlling vertical diaphragms-   9 d Open horizontal diaphragm-   9 e Closed horizontal diaphragm-   9 f Actuator with slotted openings for controlling horizontal    diaphragms-   10 Regulating device-   10 a Transmission lever-   11 Pressure gauge-   12 Computer-   13 Feed device for liquid-   14 Liquid-   14 a Liquid flow in outlet section-   14 b Residual liquid stream-   15 Crude gas stream-   15 a Crude gas stream that is allowed to pass through-   16 Standpipe cover plate-   16 a Grasp mechanism for cover plate-   16 b Hinge for cover plate-   17 Liquid level-   18 Siphon-   18 a Suspension fixture for siphon-   18 b Openings in siphon

1. An apparatus for regulating the chamber pressure of coke ovenchambers in a coke oven battery by means of adjustable diaphragms at thestandpipe gooseneck outlet openings to the crude gas collecting main,comprising a coke oven battery consisting of a number of coke ovenchambers, wherein each individual coke oven chamber can be hermeticallysealed and is equipped with a standpipe that is connected to a negativepressure-operated crude gas collecting main via a gooseneck, and thestandpipe at the top end of the gooseneck is provided with an openingand its closure that can be opened and closed, and the gooseneck isequipped with a liquid feed inlet via which the standpipe can besupplied at and/or downstream of the gooseneck with a liquid runninginto the crude gas collecting main, wherein downstream of the gooseneckthe standpipe opens into the crude gas collecting main via an outletsection, and between the gooseneck and the outlet section there is adiaphragm with an adjustable cross section which is used to close offthe gas and liquid flow and which is equipped with a device foradjusting the cross section of the opening, with either the standpipegooseneck and the crude gas collecting main being connected via a siphonthrough which the liquid can drain even when the diaphragm is closed, orthe diaphragm having a cross-sectional slit that leaves part of thediaphragm cross section open even on complete closure.
 2. The apparatusfor regulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 1,wherein the opening with the closure at the gooseneck is a cover plate,that for closure is fitted to the opening at the top end above thegooseneck branch and is equipped with a grasp for operation and a hingeat the gooseneck.
 3. The apparatus for regulating the chamber pressureof coke oven chambers in a coke oven battery by means of adjustablediaphragms at the standpipe gooseneck outlet openings to the crude gascollecting main according to claim 1, wherein the diaphragm consists ofplates that can be closed horizontally in a concentric, tangential andcircular manner towards the centre of the standpipe.
 4. The apparatusfor regulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 3,wherein the plates are fitted with pins, all of which are mounted in aspecially provided slotted opening of a ring positioned above so thatthe diaphragm opens or closes when the ring moves.
 5. The apparatus forregulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 1,wherein the diaphragm consists of plates that can be closed horizontallyin a concentric, secantial and direct manner towards the centre of thestandpipe.
 6. The apparatus for regulating the chamber pressure of cokeoven chambers in a coke oven battery by means of adjustable diaphragmsat the standpipe gooseneck outlet openings to the crude gas collectingmain according to claim 5, wherein the plates are fitted with pins, saidpins being able to be pulled out of the gooseneck by means of leversextending through the gooseneck wall to the outside so that thediaphragm opens or closes when the lever is moved.
 7. The apparatus forregulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 1,wherein the diaphragm consists of plates that are opened by being swungup or down in vertical direction.
 8. The apparatus for regulating thechamber pressure of coke oven chambers in a coke oven battery by meansof adjustable diaphragms at the standpipe gooseneck outlet openings tothe crude gas collecting main according to claim 7, wherein the platesare equipped with a circumferential wire that can be tightened orreleased by a transmission lever, thus pulling the plates up or lettingthem down and opening or closing the diaphragm with the gooseneck. 9.The apparatus for regulating the chamber pressure of coke oven chambersin a coke oven battery by means of adjustable diaphragms at thestandpipe gooseneck outlet openings to the crude gas collecting mainaccording to claim 1, wherein the diaphragm can be adjusted by means ofan electric regulating device.
 10. The apparatus for regulating thechamber pressure of coke oven chambers in a coke oven battery by meansof adjustable diaphragms at the standpipe gooseneck outlet openings tothe crude gas collecting main according to claim 1, wherein thediaphragm can be adjusted by means of a pneumatic regulating device. 11.The apparatus for regulating the chamber pressure of coke oven chambersin a coke oven battery by means of adjustable diaphragms at thestandpipe gooseneck outlet openings to the crude gas collecting mainaccording to claim 1, wherein the diaphragms and the regulating deviceare located in a gooseneck pipe section that can be removed from thegooseneck.
 12. The apparatus for regulating the chamber pressure of cokeoven chambers in a coke oven battery by means of adjustable diaphragmsat the standpipe gooseneck outlet openings to the crude gas collectingmain according to claim 11, wherein the removable pipe section is to beflanged to the gooseneck.
 13. The apparatus for regulating the chamberpressure of coke oven chambers in a coke oven battery by means ofadjustable diaphragms at the standpipe gooseneck outlet openings to thecrude gas collecting main according to claim 1, wherein the standpipegooseneck is equipped with a siphon that runs through the middle of thestandpipe gooseneck and is enclosed by the diaphragm when closed. 14.The apparatus for regulating the chamber pressure of coke oven chambersin a coke oven battery by means of adjustable diaphragms at thestandpipe gooseneck outlet openings to the crude gas collecting mainaccording to claim 1, wherein the standpipe gooseneck is equipped with asiphon that laterally passes the standpipe gooseneck outside of thestandpipe.
 15. The apparatus for regulating the chamber pressure of cokeoven chambers in a coke oven battery by means of adjustable diaphragmsat the standpipe gooseneck outlet openings to the crude gas collectingmain according to claim 1, wherein the gooseneck pipe with the diaphragmhas a diameter of 0.25 m to 0.85 m measured at the point where thediaphragms are located but excluding said diaphragms.
 16. A method forregulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 1,wherein coal is coked in cycles in the coke oven chambers of a coke ovenbattery, the cycles comprising charging, coking and pushing operations,and the gas pressure in the coke oven chamber is regulated during thecoking process via a control device at the end of the standpipegooseneck that transports the coking gas from the gas space of thecoking chamber to a negative pressure-operated crude gas collectingmain, and the gooseneck of the standpipe out of the coke oven chamber isfed with a liquid stream, wherein the gas pressure in the gas space ofthe coke oven chamber is regulated by a diaphragm that changes the crosssection of the standpipe gooseneck outlet, the cross section of thediaphragm being regulated by means of a regulating device, and when thediaphragm is completely closed, the liquid from the standpipe gooseneckdischarges into the crude gas collecting main either via a siphon or aslit in the diaphragm.
 17. The method for regulating the chamberpressure of coke oven chambers in a coke oven battery by means ofadjustable diaphragms at the standpipe gooseneck outlet openings to thecrude gas collecting main according to claim 16, wherein the coke ovengas flows into the standpipe gooseneck at a temperature of 700° C. to1100° C. and is cooled immediately by injecting liquid, with theremaining liquid being discharged into the crude gas collecting main.18. The method for regulating the chamber pressure of coke oven chambersin a coke oven battery by means of adjustable diaphragms at thestandpipe gooseneck outlet openings to the crude gas collecting mainaccording to claim 16, wherein the diaphragm is controlled as a functionof the internal pressure of the coke oven chamber.
 19. The method forregulating the chamber pressure of coke oven chambers in a coke ovenbattery by means of adjustable diaphragms at the standpipe gooseneckoutlet openings to the crude gas collecting main according to claim 18,wherein opening and closing of the diaphragm is controlled by acomputer.
 20. The method for regulating the chamber pressure of cokeoven chambers in a coke oven battery by means of adjustable diaphragmsat the standpipe gooseneck outlet openings to the crude gas collectingmain according to claim 16, wherein the cover plate of the standpipeabove the branch of the gooseneck is temporarily opened whilesimultaneously closing the diaphragm when the doors of the coke ovenchamber are opened.
 21. The method for regulating the chamber pressureof coke oven chambers in a coke oven battery by means of adjustablediaphragms at the standpipe gooseneck outlet openings to the crude gascollecting main according to claim 16, wherein the cover plate locatedin the standpipe above the standpipe gooseneck branch can be opened orclosed pneumatically.
 22. The method for regulating the chamber pressureof coke oven chambers in a coke oven battery by means of adjustablediaphragms at the standpipe gooseneck outlet openings to the crude gascollecting main according to claim 16, wherein the regulating device forthe diaphragms or for the cover plate is powered by anitrogen-containing gas.
 23. The method for regulating the chamberpressure of coke oven chambers in a coke oven battery by means ofadjustable diaphragms at the standpipe gooseneck outlet openings to thecrude gas collecting main according to claim 16, wherein the regulatingdevice for the diaphragms or for the cover plate is powered by anair-containing gas.
 24. The method for regulating the chamber pressureof coke oven chambers in a coke oven battery by means of adjustablediaphragms at the standpipe gooseneck outlet openings to the gascollecting main according to claim 16, wherein the regulating deviceremains in the control position it was last in if the drive fails. 25.The method for regulating the chamber pressure of coke oven chambers ina coke oven battery by means of adjustable diaphragms at the standpipegooseneck outlet openings to the crude gas collecting main according toclaim 16, wherein if the control mechanism drive fails, the gas pressurein the gas space of the coke oven chamber is regulated by altering thenegative pressure in the crude gas collecting main.